https://www.reuters.com/article/el-salvador-bitcoin/el-salvador-president-steps-in-to-fix-bitcoin-rollout-snags-idUSKBN2G41NY >SAN SALVADOR (Reuters) -Salvadoran President Nayib Bukele stepped in on Wednesday to manage the fraught roll-out of a payments app that underpins the nation's adoption of bitcoin as legal tender, and called on users to report any problems on his Twitter feed.