I double checked this on verbix.com and they show the following
I can confirm that there is no verb as "aquérir" in the French dictionnary.
Take a look here (from a well-known source): acquérir - Académie française
I hope this is helpful.
Bonne journée !
No other source I checked lists a word “aquérir’ sans ‘c’ - looks like a repeated typo/error on verbix.
Robert’s response as an example https://dictionnaire.lerobert.com/aquerir
Some other discussion of acquérir recently :
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