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If you experience problems in saves where either now or in the past extensions (AKA "mods") or save edits were used, please try to reproduce the issue in new, unmodified game and report as per the above. If the problem only appears to occur in a modified game, you can try to narrow down the cause by sequentially turning off extensions until it might go away. If you need a quick injection of Credits to help you narrow things down, you could use the unmodified save here and sell some assets. If successful
If successful in finding the modification cause, you can then ask for help in the thread relating to the extension or save edit. If unable to work out what extension may be the cause, you could try asking in the thread of one of mods that people have posted in recently but it's a bit of a long shot.
Please note that even after turning off or uninstalling an extension, or reversing a save edit, the save will still be considered modified.