Inside your .idea folder, change workspace.xml file
Add
<property name="dynamic.classpath" value="true" />
to
<component name="PropertiesComponent">
.
.
.
</component>
Example
<component name="PropertiesComponent">
<property name="project.structure.last.edited" value="Project" />
<property name="project.structure.proportion" value="0.0" />
<property name="project.structure.side.proportion" value="0.0" />
<property name="settings.editor.selected.configurable" value="preferences.pluginManager" />
<property name="dynamic.classpath" value="true" />
</component>
If you don't see one, feel free to add it yourself
<component name="PropertiesComponent">
<property name="dynamic.classpath" value="true" />
</component>
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…