We did the steps below:
Is there anything I forgot to do that caused this issues?
Thank You!
Check whether you have the correct php version in your server. You can put a php file in your vtiger root folder with just the following contents: <?php phpinfo();
. Execute that from a browser and take a look at what the version is. Sometimes warnings are due to incorrect php versions.
Put it both in the old and new server and compare the outputs.