R CMD check found ERRORs

Invalid usage of futures: A future (here 'Future') whose value has not yet been collected can only be queried by the R process (e3682e6b-7e56-492c-3694-fc43710cc123; pid 10760 on fv-az1766-572) that created it, not by any other R processes (0a56c7c2-bb1b-0547-e6c0-779341566ad1; pid 10792 on fv-az1766-572): {; x[[i - 2]] + x[[i - 1]]; }

Process completed with exit code 1.