As per the issue description mentioned above, Acrobat is crashing when try to share a pdf or when using create link feature, is that correct?
Could you try updating Acrobat to the latest patch using "Check for updates" option under "Help" menu, reboot the machine after installing update and try again. You may also download updates from here: Adobe software and product updates
Also, let us know if there is any error message when Acrobat crashes?
Could you confirm Acrobat dot version and the operating system installed on the machine? You may refer to the steps given in this link on how to check the version in Acrobat: Identify the product and its version for Acrobat and Reader DC
Does this happen when you are trying to share a specific pdf file or with all the pdfs?
Let us know if you need any help.