The MTC4BT project currently requires these libraries:

• knolleary/PubSubClient@^2.8
• h2zero/NimBLE-Arduino@^1.2.0
• bblanchon/ArduinoJson@^6.17.3
• arcao/Syslog@^2.0.0

Furtunately you can easily install them through PlatformIO.