IIS Server error

[Akash_N_Jain (Akash Jain)]

@eshwarsai_ks

The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

What this message means is that application waited for a database connection but the timeout expired before it could get a connection, probably because the number of connection in the pool was too low for the number of connections that were attempting, or there was a network time out, i.e. the connection between your IIS and your SQL Server was too slow to serve a connection.
Check below thread:

How can we increase SQL connecton time in uipath?

Hi All, I am working on sql database using Uipath, my problem is I am getting time out error while querying to database, actually some Query is taking more time almost 2-3 hours. can any one help me on this, I already tried to increate time out in connection string but its not working. Thanks in Advance. Rajendra.