Uncaught Error: Class ServiceProviderPluginManager not found

Problem/Motivation

Trying to test the dev. version, I uninstalled the 7.x-3.3 and installed the 7.x-3.x-dev. Now when I visit the site I see an error:

Fatal error</b>:  Uncaught Error: Class &quot;Drupal\openlayers\DependencyInjection\ServiceProviderPluginManager&quot; not found in /sites/all/modules/openlayers/lib/OpenlayersServiceContainer.php:80
Stack trace:
#0 /sites/all/modules/openlayers/lib/OpenlayersServiceContainer.php(25): OpenlayersServiceContainer::getContainerBuilder()
#1 /sites/all/modules/openlayers/openlayers.module(481): OpenlayersServiceContainer::init()
#2 /includes/module.inc(1172): openlayers_stream_wrappers_alter()
#/includes/file.inc(139): drupal_alter()
#4 /includes/file.inc(190): file_get_stream_wrappers()
#5 /includes/file.inc(227): file_stream_wrapper_get_class()
#6 /includes/file.inc(440): file_stream_wrapper_valid_scheme()
#7 /includes/common.inc(3776): file_prepare_directory()
#8 /includes/common.inc(3458): drupal_build_css_cache()
#9 /includes/common.inc(3539): drupal_aggregate_css()
#10 includes/common.inc(6166): drupal_pre_render_styles()
#11 /includes/common.inc(3275): drupal_render()
#12 /includes/theme.inc(2955): drupal_get_css()
#13 /includes/theme.inc(1125): template_process_maintenance_page()
#14 /includes/errors.inc(252): theme()
#15 /includes/bootstrap.inc(2685): _drupal_log_error()
#16 [internal function]: _drupal_exception_handler()
#17 {main}
  thrown in <b>/sites/all/modules/openlayers/lib/OpenlayersServiceContainer.php</b> on line <b>80</b><br />