In Access library not registered error mainly occurs when during the installation or uninstallation of any software, libraries get overwrite or de-register. After this, you will notice that even simple functions like Trim () or Date () stops working.
If you are dealing with the same problem then this blog is really going to help you a lot. As in this, you will get to know the best fixes to resolve library not registered error in Access 2019/2016/2013/2010/2007.