To resolve this error, you’ll have to copy the MySQL.Data.dll from the installation directory of your MySQL to the ACE and PA folder of AssistEdge Installation directory.
In my case, I did typical instllation of MySQL Connector Net 8.0.15. So, on my machine, the dll was present in C:\Program Files (x86)\MySQL\MySQL Connector Net 8.0.15\Assemblies\v4.5.2
I copied the dl from here and pasted in the Instllation folder of AssistEdge Community Edition -
C:\Users<your.username>\Documents\EdgeVerve Systems Limited\AssistEdge_CE\ACE
C:\Users<your.username>\Documents\EdgeVerve Systems Limited\AssistEdge_CE\PA
This would ideally resolve your issue.
Please mark this reply as answer if this rsolves your issue.