I have installed Coresuite in a SAP 9.0 PL 11. Its a complete fresh installation, only with the demo database for testing purpose. I have installed the 32 Bit Coresuite (v4.85) within a 32 Bit B1 Client on a Windows Server 2012 (64 Bit). After installing I got this crash report:
I have followed this manual to uninstall Coresuite
Then I have installed a v4.7 Coreuite.... worked without this error.
I created the FAQ you mention for 9.1 - please note you must not mix the installer for 9.0 with 9.1 module sips and vice versa. This would definitely cause issue and could e.g. cause a crash when starting the addon.
If you reckon that there is an issue with our latest installer or any of the 4.8x module versions, I strongly suggest to report this (to your partner, in case you are a customer or our support: helpdesk.coresystems.ch in case you are are partner).