Slow WiFi connection - Ubuntu 18.04

[jeremy31]

Your access point settings haven't changed, still using mixed mode encryption

                    Extra: Last beacon: 88ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK

[gitsad]

What do you mean? Is my router`s condiguration is incorrect ? As I said, my router is set to WPA2-AES encryption.

[jeremy31]

But the script results are showing WPA1/WPA2 with AES and TKIP
You might need to reboot the router

[sinsoff]

Hi, Jeremy. My issue with wireless seems to be similar with gitsad's one. I've tried many solutions, but nothing helps. Could you check my wireless-info?

https://pastebin.com/fWvDE1Yx