I have the same problem in MSP-EXP430F5529LP: Unable to complete output buffer initialization - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums this post.
I tried the solution on e2e china. They said " Change the project configuration to 5529 and #define MSP_USE_LEA 0"
My configuration is already 5529 and I tried the changing MSP_USE_LEA to 0 but nothing changed.
Can you please help me I couldn't find any solution or information in anywhere.