You need more time to let it dry. Perhaps several days.
Also, if this area got wet from leakage from below, from a plumbing leak
within the slab, or springs under the house, further diagnostic work needs
to be done before any new, especially expensive, flooring is considered.
Best case, there may have been a surface spill that seeped under the
flooring, causing mildew and mold. Whatever, the pic looks like there is a
major moisture source in that area, that needs to be examined.