1. Check for Windows Updates. Download, Install, and Restart Windows until no new windows updates are available in “Check for Updates” (This is a Windows function).

2. Then run the repair updates tool for ProSeries.

3. If this does not fix your E-signature issue, go into your ProWin19 folder, rename the current “32bit” subfolder to “32bitOld” and create a new folder called 32bit within the ProWin19 folder. Then reinstall ProSeries to the ProWin19 folder. 

If you are on a network installation, follow the steps 1 and 2. If this does not solve your issue, rename the ProWin19 folder to ProWin19Old, then go your shared network folder ProNet19, go to into the sub folder wkstn, and run the Setup.exe .

This should solve your e-signature “Invalid URL”, “an unexpected error occurred”, or blank white screen issue.