TPM disappeared from BIOS. BitLocker won't resume (TPM cannot be found)

I have a Latitude 5580 with everything up-to-date (done via Dell Command Update). Current version of the BIOS is 1.5.2

Lately, I needed to enter the bitlocker recovery key every single boot. After investigating, I found out the TPM option disappeared from the BIOS.
Then, I disabled BitLocker but cannot resume due to 'A compatible Trusted Platform Module (TPM) Security Device cannot be found on this computer' message.