Hi,
Did you get any error message when sharing the link to colleagues?
Did this problem appear in all files or folders? I suggest you try to create a new file in a new folder and share the link to colleagues, please check if this problem still existed.
I suggest you refer to this support article and try the methods to confirm if it will help:
If anything is unclear with the previous information I've provided to you, please don't hesitate to let me know. I am glad to be of assistance.
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