I've answered a similar question previously here From my conclusion to that answer:

What the above two events demonstrate quite plainly is that Protestants were quite committed to their own theological system, a system that the Eastern Church simply did not accept and was unwilling to negotiate on. Protestant slogans like sola fide and sola scriptura had no place in the Christian East. Many Protestants, for their part, were still highly committed to distinctly Western theological concepts. Lutherans, Calvinists, and Anglicans all kept the filioque phrase in their versions of the Niceno-Constantinopolitan Creed, the inclusion of which had been the immediate the Great East-West Schism in the first place. Likewise, the Eastern Orthodox Church practiced many things the Protestants would never accept: the veneration of saints (especially through the use of icons), prayers to Mary, Apostolic Succession, etc. With the exception of certain Anglo-Catholic groups, those barriers remain to this day.