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Unexpected token < in JSON at position 0 at parse (<anonymous>)

Hello every one, my app was working gut in my laptop till the IT service of our company , because of home office, install a MFA VPN on my laptop and since then, when i try to login in my app, i receive this error: Unexpected token < in JSON at position 0 at parse (). Please is there any way to bypass this problem without deinstalling the vpn?