They don’t need to do anything. If the agreement was entered into in violation of the state’s open meetings laws, the contract is not binding. They can take an official action to deem the agreement null and void, and force WDPR to sue.
Section 286.011, provides that no resolution, rule, regulation or formal action shall be considered binding except as taken or made at an open meeting. They can find, and self-assert, that the agreement was entered into in violation of the open meeting act. The correction, if they so choose, is a curative attempt to have the meetings appropriately publicly noticed.
163.3235 even enables them to unilaterally revoke a development agreement If they find competent evidence of failure to comply.