The IP address refuses to change (network card)

Hello, how are you? I hope you are well, which is not the case for me, because for some time now, when I try to modify my IP address in the network settings and when I validate, I get this message that appears in the dialog box: "An unexpected error occurred. the changes you requested in the settings could not be fully made" so I am stuck on the last address I had assigned, which is very annoying when I try to perform certain operations... In short, what is this problem due to and how should I go about fixing it.

Thank you, I think I have been explicit enough