Suddenly, without any hint of understanding why, all our custom plugins give the error in the subject. We have create/update plugins that are quite simple and have not been changed for days. (account, opportunity, lead, contact, connection).
The error on ALL plugin executions now are: "The plug-in execution failed because no Sandbox Worker processes are currently available"
Disabling for example step for Update Opportunity still gives the same error when updating opportunity (and for all other plugins on other entities). Only unregistering the whole assembly will remove the error but then we dont get the desired functionality in the system obviously...
Most of the threads I've found regarding this subject are for onprem and say to check the sandbox service. But ours is online...Version 1710 (9.1.0.17446) online.
I did not manage to register the pluings in "Isolation mode: none", probably because it is an online environment....
UPDATE:
The error changed now (without any changes from our side) from throwing just the message in the subject to a more extensive message:
The plug-in execution failed because no Sandbox Worker processes are currently available. Please try again.
System.ServiceModel.CommunicationException:
The server did not provide a meaningful reply; this might be caused by a contract mismatch, a premature session shutdown or an internal server error. Server stack trace: at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) Exception rethrown at [0]: at Microsoft.Crm.Sandbox.SandboxWorkerProcess.Execute(SandboxCallInfo callInfo, SandboxPluginExecutionContext requestContext, Guid pluginAssemblyId, Int32 sourceHash, String assemblyName, Guid pluginTypeId, String pluginTypeName, String pluginConfiguration, String pluginSecureConfig, Boolean returnTraceInfo, Int64& wcfExecInMs, Int64& initializeInMs, Int64& trackCallInMs, Int64& trackGoodReturnInMs, Int64& waitInMs, Int64& taskStartDelay): Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #4BED20F4
Any help deeply appreciated.
