Fortianalyzer does not display logs

Hello! Our fortianalyzer stopped displaying logs 2 days ago. I am using fortigate with version 7.0.13 build0566 and fortianalyzer with version 7.6.3.
From the fortigate graphical interface I can successfully run a connection test with fortianalyzer. However, through the CLI command "execute log fortianalyzer test-connectivity" I see the output "Log: Tx & Rx (log not received)":

execute log fortianalyzer test-connectivity FortiAnalyzer Host Name: FAZ-MINUANO FortiAnalyzer Adom Name:  FortiGate Device ID: FGT40FTK21099EV4 Registration: registered Connection: allow Adom Disk Space (Used/Allocated): 0B/Unlimited Analytics Usage (Used/Allocated): 0B/Unlimited Analytics Usage (Data Policy Days Actual/Configured): 0/0 Days Archive Usage (Used/Allocated): 0B/Unlimited Archive Usage (Data Policy Days Actual/Configured): 0/0 Days Log: Tx & Rx (log not received) IPS Packet Log: Tx & Rx Content Archive: Tx & Rx Quarantine: Tx & Rx  Certificate of Fortianalyzer valid and serial number is:FAZ-XXXXXXX

Below is an image of how the LOG session of our fortianalyzer appears. It seems that some menu buttons have disappeared.

I have already run the "diag sys fsck harddisk" command in fortianalyzer and no disk problems were found.

When I run the "diagnose sql status" command in fortianalyser, nothing is displayed.

Does anyone have any tips?