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As Patrick Eckebrecht noted in his comment to this question, it was enough to click “View Detail” to find the reason for the exception:

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solved ‘System.AggregateException’ occurred in mscorlib.dll” when using SignalR
[ad_1]
As Patrick Eckebrecht noted in his comment to this question, it was enough to click “View Detail” to find the reason for the exception:

[ad_2]
solved ‘System.AggregateException’ occurred in mscorlib.dll” when using SignalR