Thank you for reporting the issue.
As the application crashes when you use the Fill & Sign feature, try the troubleshooting steps provided here
Try once to fill the PDF online here Adobe Document Cloud using the Fill & Sign feature.
Open the link and sign in with your Adobe ID(email address).
Then go to Home and select Fill & Sign tool.
Check if you can fill the form without any issue there.
You may try recreating the application preferences. Refer to the steps mentioned here How to reset Acrobat Preference settings to default.
Let us know how it goes.
Feel free to update the thread if the issue still persists.
It's likely due to a bug in acrobat related to trying to prefill the text. I haven't found a way to turn off this stupid feature that keeps crashing adobe but it happens a lot. If you copy and paste the test it can get by it. Try typing "ACC " with the space and paste it into the box. The troubleshooting tips are just stupid. Sign into another computer account? How is that seriously a suggestion. Other option is to use the Edit tool and then add the text outside of the fill and sign tool.