disco | encrypt communications and a cryptographic library | Cryptography library

After I activate my conda environment and I run which python, I get the following

when I try to run certbot in my console on my Linux Ubuntu Server 20.04.3 LTS, I get following error:

I am trying to create an ignite service using aspnetcore background service functionality. When I start the service it works fine, but as soon as a client is attempting to connect I get the following exception:

[09:51:15,746][SEVERE][disco-notifier-worker-#75%ignite-instance-7b562b36-d203-4652-99ec-5fad30b09a3b%][] JVM will be halted immediately due to the failure: [failureCtx=FailureContext [type=SYSTEM_WORKER_TERMINATION, err=class o.a.i.IgniteException: Invalid array specification: Npgsql.TypeHandlers.TextHandler+-Read>d__7]]

I am using the below configuration for Ignition.Start():

{"IgniteInstanceName":null,"AutoGenerateIgniteInstanceName":true,"GridName":null,"BinaryConfiguration":null,"CacheConfiguration":null,"SpringConfigUrl":null,"JvmDllPath":null,"IgniteHome":null,"JvmClasspath":null,"JvmOptions":["-Xms1024m","-Xmx1024m"],"Assemblies":null,"SuppressWarnings":false,"LifecycleHandlers":null,"JvmInitialMemoryMb":-1,"JvmMaxMemoryMb":-1,"DiscoverySpi":{"IpFinder":{"LocalAddress":null,"MulticastGroup":"228.1.2.4","MulticastPort":47400,"AddressRequestAttempts":2,"ResponseTimeout":"00:00:00.5000000","TimeToLive":null,"Endpoints":["127.0.0.1:47500..47509"]},"SocketTimeout":"00:00:05","AckTimeout":"00:00:05","MaxAckTimeout":"00:10:00","NetworkTimeout":"00:00:05","JoinTimeout":"00:00:00","ForceServerMode":false,"ClientReconnectDisabled":false,"LocalAddress":null,"ReconnectCount":10,"LocalPort":47500,"LocalPortRange":100,"StatisticsPrintFrequency":"00:00:00","IpFinderCleanFrequency":"00:01:00","ThreadPriority":10,"TopologyHistorySize":1000},"CommunicationSpi":null,"EncryptionSpi":null,"ClientMode":false,"IncludedEventTypes":[12,22,45],"LocalEventListeners":null,"MetricsExpireTime":"10675199.02:48:05.4775807","MetricsHistorySize":10000,"MetricsLogFrequency":"00:01:00","MetricsUpdateFrequency":"00:00:02","NetworkSendRetryCount":3,"NetworkSendRetryDelay":"00:00:01","NetworkTimeout":"00:00:05","WorkDirectory":"D:\ApacheIgniteDataJr\","Localhost":null,"IsDaemon":false,"UserAttributes":null,"AtomicConfiguration":null,"TransactionConfiguration":null,"IsLateAffinityAssignment":true,"Logger":null,"FailureDetectionTimeout":"00:00:10","SystemWorkerBlockedTimeout":null,"ClientFailureDetectionTimeout":"00:00:30","PluginConfigurations":null,"EventStorageSpi":null,"MemoryConfiguration":null,"DataStorageConfiguration":{"StoragePath":null,"CheckpointFrequency":"00:03:00","CheckpointThreads":4,"LockWaitTime":"00:00:10","WalHistorySize":20,"WalSegments":10,"WalSegmentSize":67108864,"WalPath":"db/wal","WalArchivePath":"db/wal/archive","WalMode":1,"WalThreadLocalBufferSize":131072,"WalFlushFrequency":"00:00:02","WalFsyncDelayNanos":1000,"WalRecordIteratorBufferSize":67108864,"AlwaysWriteFullPages":false,"MetricsEnabled":false,"MetricsRateTimeInterval":"00:01:00","MetricsSubIntervalCount":5,"CheckpointWriteOrder":1,"WriteThrottlingEnabled":false,"WalCompactionEnabled":false,"MaxWalArchiveSize":1073741824,"SystemRegionInitialSize":41943040,"SystemRegionMaxSize":104857600,"PageSize":4096,"ConcurrencyLevel":16,"WalAutoArchiveAfterInactivity":"-00:00:00.0010000","CheckpointReadLockTimeout":null,"WalPageCompression":0,"WalPageCompressionLevel":null,"DataRegionConfigurations":[{"Name":"ProductName_Region","PersistenceEnabled":true,"InitialSize":104857600,"MaxSize":429496729,"SwapPath":null,"PageEvictionMode":0,"EvictionThreshold":0.9,"EmptyPagesPoolSize":100,"MetricsEnabled":false,"MetricsRateTimeInterval":"00:01:00","MetricsSubIntervalCount":5,"CheckpointPageBufferSize":0,"LazyMemoryAllocation":true}],"DefaultDataRegionConfiguration":{"Name":"Default_Region","PersistenceEnabled":false,"InitialSize":104857600,"MaxSize":429496729,"SwapPath":null,"PageEvictionMode":0,"EvictionThreshold":0.9,"EmptyPagesPoolSize":100,"MetricsEnabled":false,"MetricsRateTimeInterval":"00:01:00","MetricsSubIntervalCount":5,"CheckpointPageBufferSize":0,"LazyMemoryAllocation":true}},"SslContextFactory":null,"PeerAssemblyLoadingMode":0,"PublicThreadPoolSize":16,"StripedThreadPoolSize":16,"ServiceThreadPoolSize":16,"SystemThreadPoolSize":16,"AsyncCallbackThreadPoolSize":16,"ManagementThreadPoolSize":4,"DataStreamerThreadPoolSize":16,"UtilityCacheThreadPoolSize":16,"QueryThreadPoolSize":16,"SqlConnectorConfiguration":null,"ClientConnectorConfiguration":null,"ClientConnectorConfigurationEnabled":true,"LongQueryWarningTimeout":"00:00:03","PersistentStoreConfiguration":null,"IsActiveOnStart":true,"ConsistentId":null,"RedirectJavaConsoleOutput":true,"AuthenticationEnabled":false,"MvccVacuumFrequency":5000,"MvccVacuumThreadCount":2,"SqlQueryHistorySize":1000,"FailureHandler":null,"SqlSchemas":["PRODUCTNAME_MODELS"],"ExecutorConfiguration":null,"JavaPeerClassLoadingEnabled":false,"AsyncContinuationExecutor":0}

After starting the node, I am activating and setting baseline auto-adjustment flag.

What am I doing wrong here?

I want to broadcast live music from a server to around 100 mobile phone clients in a local area network. The goal is a setup known from silent-discos, but over IP with mobile phones as receivers. The listeners should use headphones, no perfect sync is required. A delay of 1-3 sec would be acceptable.

My first setup used Icecast (TCP based), which lead to a good music quality but high delay (4-50 sec). My second approach uses Janus WebRTC server (with streaming plugin) that achieves sub-second delay, but the audio quality is only medium (optimized for voice, no consistent playback speed).

I found this issue describing an SRT server that supports multiple client connections.

Should I optimize my Janus/WebRTC approach for music, or try to build a solution with SRT, or is there an even better protocol/solution?

There are two tables in my file (it's about vinyl records):

Records

Styles

(Styles.style is stored as an Integer but a String is used for simplicity here)

Following condition is set for table Styles:
Styles.recordId = Records.ID for every given vinyl record

->This is necessary to find all styles related to one specific vinyl record

Therefore, there are two vinyls stored:

Title_1 has two styles Blues, Disco
Title_2 has two styles Blues, Electro

In my SELECT query, I want to find vinyl records with a certain style

If I want to find a vinyl record with one specific style, it seems pretty straight forward.
I use:

Okay so I've a contact form I want people to select multiple items, once they submit the contact form I want it to send an email using a html template. I've set it up to string replace the data in the html template, but every time I try to do the array it ether says array or only shows one of the multiple items that were selected.

This is the HTML Select Code I made sure to add [] to make the name into an array.

I have a wordpress+nginx in a docker container that is working perfectly through the browser, but when I try to send an http request via curl without headers the response is always empty

I am new here. I am a begginer with python so I am trying to write a code that allows me to remove the link break of a list in python.

I have the following list (which is more extense), but I will share a part of it.

I have kind of a special problem. I am currently learning react and have fetched data from my own demo API (a Java Spring project).

However, I receive the data correctly in React. Now I am creating Components with it (Music Track Metadata). The response of the API returns an Array of Objects and one item within the object is a nested object. Now i don't know how i can extract this information to my React component.

Here is an example JSON of my response: