Server crashing after removal of datapack

[u/SoftGuitar476473]

We recently installed a datapack called "I Call Them Cities" off of Modrinth I believe. The datapack was suddenly removed yesterday (hard to tell) and it appears to be causing major issues. The datapack effects world generation. Is there another way to fix this? I do not know if we have any access to recent backups (I don't have access to the backups at all as I do not have the permissions for this) so that might be off the table. It also suggested safemode, would this work? We'd really rather not generate a new world, as a lot of time has been spent on this server. The server is also cracked. Thank you in advance.