How do I remove vinyl glue off of tile flooring?
MEK or methyl Ethel ketone with good ventilation and chemical gloves will dissolve the adhesive, the biggest problem is some residue in the grout. Once the tile is clean a muratic acid solution and water will etch the grout reducing any left over residue.  Use a rag that is damp with MEK if you pour it on the adhesive will dissolve and really get into the grout. After etching and cleanup the grout will need to be resealed.