I built an addin for MS Project, this worked perfectly but for the two weeks, when I have tried to launch MS Project in DEV, I have the following error message:
Connection failed: An error occurred while making the HTTP request to https://mysharepointsite/projects//_vti_bin/WCF/Threon.PS2013.EIB.PSIExtension.svc. This could be due to the fact that the server certificate is not configured properly with HTTP.SYS in the HTTPS case. This could also be caused by a mismatch of the security binding between the client and the server.
If I work on the test server, the addin works perfectly but when I launch Project from my computer, I have the error message (and once again, only in DEV)
I just have this error with the DEV server, on the PROD, I don't have this issue the server are aligned for the update and I checked the TLS and they use the same: TLS 1.2, AES with 128 bit encryption (High); ECDH with 256 bit exchange
Any idea of what I could do?
Thank you for your help