From what you described, I can only assume that:
(1) You installed some kind of MSP430 development software on some kind of PC.
(2) This development software is capable of using both the JLINK430 and MSP-FET-430UIF hardware tools. It probable uses different device drivers to do so.
(3) The JLINK430 or MSP-FET-430UIF is connected to some kind of target board with a MSP430F2011 on it.
(4) You were able to use the above to load and debug F2011 before. But now the above refuse to do so and show you the error messages.
If the above statements are correct. Then my assessments of the problem are:
(a) The settings in the development software are changed and made it incompatible with what you intend to do.
(b) The environment of the operating system in the PC is changed and causes it to use the wrong device driver or renders the device driver malfunction.
(c) The connection between JLINK430 or MSP-FET-430UIF and the target board is defective.
(d) Something went wrong on the target board or the F2011.
(e) I do not think this problem has anything to do with what code you try to load and debug. The problem is in the “tool chain”.