dependency between extensions.

Hello All,

Till now my BC Sandbox environment was working fine. But now it is giving below error

[2018-12-13 15:53:42.45] The request for path /v1.0/sandbox/dev/apps?SchemaUpdateMode=synchronize failed with code 422. Reason: The extension was unable to be deployed due to a dependency between extensions.

Details are as below,

checked for solution, its saying by uninstall and un publish will work. I know where is Extension Management But dont know the procedure for it. Can someone explain it?? what to do??

You properly have created an extension that is dependent on the extension you are trying to republish

Search for “Extension Management” in windows client and then click on “Uninstall”.