“…Sub-barriers lack of recognisability and understability of the system function Lack of tutorial how to co-create OER [41], [13], [47], [37], [22], * Lack of an easy way to revise OER [49] Difficulty to reuse a small part of an LO [44], [49], [36], [20], * Different preferences for system interaction Different type of preferred interaction design [48],* Key issue: Connectivity Barriers Sub-barriers Lack of supportive socialization tools Lack of forum to discuss problems [42] Missing notification of change [22], ** Lack of OERs students of end-user integration * Difficulties in adapting various communication channels Different type of communication channel * Difficulty in synchronizing working time [41], * Lack of real-time communication channel [46], [44], [49], [53], [20], [40] Key issue: Privacy Barriers Sub-barriers lack of a clear data protection agreement Lack of validity of OER. level of required information about the author of OER [36], * Lack of privacy [38] *interview, **observation, ***interview, and observation environment [31].…”